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Now showing items 331-340 of 451
Diffuse Phase Transition In Non-Stoichiometric LiRbSO4 Crystals
(
Qatar University
, 1992 , Article)
The influence of changing the ratio of Li2S04 on the structure transition of (RbxLi1-x)2S04 , LRS crystals, where x ranged from 0.1 to 0. 7, was studied by thermal analysis techniques in the temperature range 300 - 600 K. ...
Mineralogy and Genesis of Heavy Minerals in Coastal Dune Sands, South Eastern Qatar
(
Qatar University
, 1999 , Article)
Large amounts of aeolian sand occur in the southeastern coastal zone of Qatar Peninsula as sand dunes accumulated in a vast sand field locally called " Niqyan Qatar ". The present work, carried out on a sand dune belt of ...
Two Forms Of The Backlund Transformation Of A Third Order Differential Equation
(
Qatar University
, 1996 , Article)
Two explicit forms of Backlund transformation of third order dispersive differential equation are derived. The method of derivation depends on the use of a transformation that couples the equation with its modified one.
Effect Of Gossypol, Apogossypol And Gossypolone On Fertility Of Male Rats And In Vitro Sperm Motility
(
Qatar University
, 1993 , Article)
The effect of the naturally occurring polyphenolic pigment, gossypol, and some of its metabolites, apogossypol and gossypolone, on the fertility of male rats has been studied in vivo. The normal growth of the rats was ...
The effect of gossypol, gossypolone and apogossypol on the lipids of male rat Serum and seminal fluid
(
Qatar University
, 1994 , Article)
The neutral and polar lipids of serum and seminal fluid of male rats were investigated under the effect of gossypol acetic acid, apogossypol and gossypolone. The total phospholipids and the neutral serum lipids showed ...
Fish diversity in correlation with some environmental factors in the mangal of two protectorate areas, ras muhammed and nabq on the red sea in egypt.
(
Qatar University
, 1997 , Article)
The present investigation is an attempt to study the fish diversity at five sites of the mangrove forests (Mangal) in two famous protectorate areas : Ras Muhammed and Nabq on the Red Sea in Egypt. The present investigation ...
Population Structure And Growth Curve Of Acanthopleura Gemmata (Mollusca: Polyplacophora) In The Northwestern Red Sea
(
Qatar University
, 1996 , Article)
Studies on Acanthopleura gemmata population were carried out in a site located on northwestern coast of the Red Sea called Sharm Elnagha, 40 km south of Hurghada city, Egypt (26° 56' N and 43° 00' E). In these studies, the ...
Fatty acid composition of sargassum denticulatua1and s. Latifouum as influenced by the time of collection and the plant organ
(
Qatar University
, 1995 , Article)
Fatty acid profile of two species of Sargassum namely, 5. denticulatium (Forsk). Borgesen and S. latifolium (Turn) Ag., from the Red Sea coast of Egypt was studied. Fatty acid data indicate that there is a strong seasonal ...
Intensive shrimp Penaeus semisulcatus Dee Haan, culture in the Arabian Gulf during the summer
(
Qatar University
, 1999 , Article)
P. semisulcatus juveniles (average weight 9.7g) from Manifa Lagoon on the Arabian Gulf were randomly stocked in tanks (0.8m3) at three stocking density levels (25, 50 and 75 shrimp/m3) in four replicates.
The tanks were ...
Separation and preconcentration of malathion and azamethiphos by Unloaded polyurethane foams
(
Qatar University
, 1994 , Article)
The feasibility of using unloaded polyether type polyurethahe foams for the extraction and separation of malathion and azamethiphos in batch and column operations has been examined. The effects of pH, ionic strength, shaking ...